Não informado. (1975). Rubber industry. Plastics and Rubber Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Rubber Industry. London: Plastics and Rubber Institute, 1975.
Lua MLA (8ú heag.)Não informado. Rubber Industry. Plastics and Rubber Institute, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.